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FANUC Alarm PWD-066 — Bad password data

FANUC PWD-066 (“Bad password data”): There are 2 causes for this alarm. First check: For the first cause, check the password USB device.

Updated 2026-09-17 · LogrobotLM reference

Description

There are 2 causes for this alarm. The first is that the password USB device has incorrect username and password. This will be the cause code for PWD-062 Login from USB device is cancelled. The second is that a password configuration file, FRS:PASSWORD.DT, is invalid.

Remedy

For the first cause, check the password USB device. Your INSTALL user may have to add your username and password using the SETUP Passwords menu. For the second cause, the INSTALL user should IMPORT a correct password configuration file using the SETUP Passwords menu. This file will replace FRS:PASSWORD.DT. It becomes a binary file for protection. It is possible that an invalid configuration file was restored because someone tried to break into the password system.

Related codes

PWD-064User time extendedPWD-065Password USB device insertedPWD-067Edit operation not allowedPWD-068Menu access is not allowed

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →